Pioneer A-40AE Instruction Manual page 22

0 Make sure that the speaker cables have not shorted.
0 Make sure the speakers are connected correctly. (p8, 9,
10)
∫ Noise can be heard
0 Using cable ties to bundle analog audio cables, power
cords, speaker cables, etc. may degrade the audio
performance, Do not bundle cords.
0 An audio cable may be picking up interference. Try
repositioning your cables.
∫ Headphone output is intermittent or there's no
sound
0 The connection part may be dirty. Clean the headphones
plug. See your headphones' instruction manual for
cleaning information. Also, make sure that the
headphones cable is not broken or damaged.
Remote Controller
0 Make sure that the batteries are installed with the correct
polarity.
0 Install new batteries. Do not mix different types of
batteries, or old and new batteries.
0 Make sure that the unit is not subjected to direct sunshine
or inverter-type fluorescent lights. Relocate if necessary.
0 If the unit is installed in a rack or cabinet with colored-
glass doors or if the doors are closed, the remote
controller may not work reliably.
∫ The centralized control function doesn't work
0 Make sure that the CONTROL IN/OUT jacks are properly
connected.
0 Also make sure to connect with the analog audio cable.
Centralized control cannot work correctly with only the
control jack connection. When connecting a player using
either a digital optical cable or digital coaxial cable, also
make sure to connect with an analog audio cable.
∫ Cannot switch the input source
0 If this unit is set to be used as a power amplifier, you will
be unable to switch the input source or adjust the sound
quality. Check the setting. (p18)
Others
∫ Strange noises can be heard from the unit
0 If you have connected another unit to the same wall outlet
as this unit, this noise may be an effect from the other
unit. If the symptoms improve by unplugging the power
cord of the other unit, use different wall outlets for this unit
and the other unit.
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Others